Final answer:
The answer is Cajuns and French Creoles.
Step-by-step explanation:
Two vibrant French subcultures that give testimony to the cultural pluralism in the US are the Cajuns and the French Creoles.
Cajuns are descendants of French-Canadian migrants who settled in the swampy southern region of Louisiana. They have their own distinct foodways, musical traditions, and cultural practices that set them apart from mainstream America.
French Creoles, on the other hand, are descendants of the original French and African settlers in Louisiana. They have their own unique language, cuisine, and traditions that have been shaped by both French and African influences.